Barium sulfate and strontium sulfate scale inhibitor, preparation method and application thereof
A technology of antiscalant and chelating agent, applied in chemical instruments and methods, descaling and water softening, special treatment targets, etc., can solve oil field production and stable production hazards, affect oil and gas field development benefits, etc., to prevent pipe string and Formation scaling, barium strontium sulfate scale inhibition, low price effect
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Embodiment 1
[0076] This embodiment provides a barium strontium sulfate scale inhibitor, the total weight of the scale inhibitor is 100%, and the scale inhibitor is prepared from raw materials comprising the following weight percentages:
[0077] Chelating agent 10%;
[0078] Initiator 1%;
[0079] Phosphorous acid 3%;
[0080] Acrylic acid 6%;
[0081] Regulator 1%;
[0082] Formaldehyde 1%;
[0083] Surfactant 2%;
[0084] and the remainder of the water;
[0085] In this embodiment, the chelating agent is a 30% aqueous solution prepared from diethylenetriaminepentaacetic acid, citric acid, and hydrolyzed polymaleic anhydride in a mass ratio of 1:2:0.5;
[0086] Described initiator is ammonium persulfate;
[0087] Described acrylic acid is analytically pure acrylic acid;
[0088] The regulator is sodium hydroxide;
[0089] The surfactant is sodium dodecylbenzenesulfonate.
[0090] The scale inhibitor described in this embodiment is prepared by the preparation method comprising t...
Embodiment 2
[0097] This embodiment provides a barium strontium sulfate scale inhibitor, the total weight of the scale inhibitor is 100%, and the scale inhibitor is prepared from raw materials comprising the following weight percentages:
[0098] Chelating agent 10%;
[0099] Initiator 1%;
[0100] Phosphorous acid 3%;
[0101] Acrylic acid 6%;
[0102] Regulator 1%;
[0103] Formaldehyde 1%;
[0104] Surfactant 2%;
[0105] and the remainder of the water;
[0106] In the present embodiment, the chelating agent is diethylenetriaminepentaacetic acid;
[0107] Described initiator is ammonium persulfate;
[0108] Described acrylic acid is analytically pure acrylic acid;
[0109] The regulator is sodium hydroxide;
[0110] The surfactant is sodium dodecylbenzenesulfonate.
[0111] The scale inhibitor described in this embodiment is prepared by the preparation method comprising the following steps:
[0112] (1) Add the acrylic acid and initiator into water, heat to 60°C to dissolve c...
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